Most volcanoes form near colliding plate boundaries.

Fun Facts!

  • Lava flows out of a volcano through a hole called a vent.
  • The top of the main vent of a volcano is also called a crater.
  • If a volcano produces only layers of lava, the volcano will have gently-sloped sides.
  • Volcanoes with steep sides have made some or all of their layers with ash and rocks.
  • If a volcano is not active, its crater can sometimes fill with rainwater to form a lake.
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Be Careful!

Safety Tips

  • Stay away from active volcanoes.
  • If you live near an active volcano, keep goggles and a mask in an emergency kit, along with a flashlight and a working, battery-operated radio.
  • Know your evacuation route. Keep gas in your car.

-National Geographic

If a Volcano Erupts in Your Area

  • Evacuate only as recommended by authorities to stay clear of lava, mud flows, and flying rocks and debris.
  • Avoid river areas and low-lying regions.
  • Before you leave the house, change into long-sleeved shirts and long pants and use goggles or eyeglasses, not contacts. Wear an emergency mask or hold a damp cloth over your face.
  • If you are not evacuating, close windows and doors and block chimneys and other vents, to prevent ash from coming into the house.
  • Be aware that ash may put excess weight on your roof and need to be swept away. Wear protection during cleanups.
  • Ash can damage engines and metal parts, so avoid driving. If you must drive, stay below 35 miles (56 kilometers) an hour.

-National Geographic